Is the Christian God fair?

[John V]

Well he can be fair by being graceful to non-believers too.

Yep. He chooses whom he chooses.

In this sense, he is isn't implementing justice (you won't go to hell),

Which is unfair.

but he isn't being unfair to others (they won't go to hell when they have done more praiseworthy things then you).

As noted, salvation is an act of grace and mercy, and grace and mercy are unmerited. So, it's illogical to base them on merit, i.e. praiseworthy things done.

The problem with showing you it's wrong of God, is that morals are often reduced to properly basic intuitions or beliefs or knowledge.

You haven't shown it's wrong. I have no problem with people who show grace and mercy to some, but not all. Unfair does not equal wrong.

Furthermore, not only is it unfair, it's cruel.

How so?